package org.smart4j.framework.util;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * JSON 工具类
 *
 * @author: Mr.Zhou
 * @create: 2018-10-24 16:40
 **/
public final class JsonUtil {

    private static final Logger LOGGER= LoggerFactory.getLogger(JsonUtil.class);

    private static final ObjectMapper OBJECT_MAPPER=new ObjectMapper();

    /**
     * 将 POJO 转为 JSON
     */
    public static <T> String toJson(T obj){
        String json;
        try{
            json=OBJECT_MAPPER.writeValueAsString(obj);
        }catch (Exception e){
            LOGGER.error("convert POJO to JSON failure",e);
            throw new RuntimeException(e);
        }
        return json;
    }

    /**
     * 将 JSON 转为 POJO
     */
    public static <T> T fromJson(String json,Class<T> classType){
        T pojo;
        try{
            pojo=OBJECT_MAPPER.readValue(json,classType);
        }catch (Exception e){
            LOGGER.error("convert JSON to POJO failure",e);
            throw new RuntimeException(e);
        }
        return pojo;
    }
}
